This Air Supply Cover Port for DeVilbiss IntelliPAP 2 Series CPAP machines (DV61D-604) is a high-quality replacement port plug that is used to cover the airport behind the machine. This is valuable for users who want to be able to attach the integrated humidifier that comes optional with IntelliPAP CPAP machines. This IntelliPAP replacement part from CPAP Man is compatible across all IntelliPAP devices, including IntelliPAP 2. Because it’s made by DeVilbiss, you can be sure this part will fit perfectly on your unique machine.